One of the people I met at the recent PowerShell Deep Dive was Boe Prox. Among other claims to fame he has produced a PowerShell module for administering WSUS. http://poshwsus.codeplex.com/
The latest version was posted in January 2011 and further updates are in the pipeline.
If you need to manage WSUS this is just the tool for you. I’d recommend you down load it and give it a try.
Very useful set of tools.